Light-emitting medium

摘要

A light-emitting medium including a light-emitting image having a pattern area formed on a substrate by using a first fluorescent ink containing a first fluorescent material, a background area formed on the substrate by using a second fluorescent ink containing a second fluorescent material, and a overcoat layer formed on the first fluorescent material of the pattern area and the second fluorescent material of the background area. The first fluorescent material is made of a fluorescent material which emits light of blue color when UV-A is irradiated, and emits light of red color when UV-C is irradiated. The second fluorescent material is made of a fluorescent material which emits light of blue color or light of a color that is viewed as the same color as the blue color when the UV-A is irradiated, and emits light of green color when the UV-C is irradiated.

主权项

1. A light-emitting medium including a light-emitting image on a substrate wherein:
the light-emitting image includes a first area containing a first fluorescent material, a second area containing a second fluorescent material, and a protective layer formed on the first fluorescent material of the first area and the second fluorescent material of the second area; at least a part of the second area is adjacent to the first area; the first fluorescent material and the second fluorescent material are configured to emit light of colors that are a same color when invisible light within a first wavelength range is independently irradiated and when invisible light within a second wavelength range is independently irradiated; and the first fluorescent material and the second fluorescent material are configured to emit light of colors that arc different colors from each other when the invisible light within the first wavelength range and the invisible light within the second wavelength range are simultaneously irradiated.